Superconducting-like response in driven systems near the Mott transition

Abstract

We point out that fractionalized bosonic charge excitations can explain the recently discovered photo-induced superconducting-like response in $\kappa \text{-(ET}{)}_2\text{Cu}[{\text{N(CN)}}_2]\text{Br}$, an organic metal close to the Mott transition. The pump laser exerts a periodic drive on the fractionalized field, creating a non-equilibrium condensate, which gives a Drude peak much narrower than the equilibrium scattering rate, hence superconducting-like response. Our proposal illuminates new possibilities of detecting fractionalization and can be readily tested in spin liquid candidates and in cold atom systems.

arXiv comment5 pages, 3 figures

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Cited by in corpus (6)

• Light-induced emergent phenomena in 2D materials and topological materials
• Near-infrared light-induced superconducting-like state in underdoped YBa${}_2$Cu${}_3$O${}_y$ studied by $c$-axis terahertz third-harmonic generation
• A phase diagram for light-induced superconductivity in $\kappa$-(ET)${}_2$-X
• Vortex and soliton dynamics in particle-hole symmetric superfluids
• Parametric control of Meissner screening in light-driven superconductors
• Steady-states and response functions of the periodically driven O(N) scalar field theory